See: afganistan, expanding africom, iraq, etc
The ugly truth is that there are plenty of bad guys or people who would be bad guys (some of them in the U.S. admittedly), and a lot of them won't stop without force or threat of force.
I know this isn't a universal opinion but I believe that smarter military technology has a better chance of ending/stopping/preventing war than starting it.
A global surveillance network and insect-sized drones that precisely assasinate "enemy" leaders.
Why bother with infantry and big guns etc.?
I truly hate that my research will contribute to killing. I wish that it wasn't necessary. But as events like Crimea annexation and the South China Sea shows, if the USA is not there, then other nations are very happy to use their might to boss others around. I truly do think the USA is a force for good, and I want that to be there for my following generations.
This is kind of the same logic that often makes me wish for an extraterrestrial invasion.
An alien species has a much higher chance of treating us all equally, than we do ourselves.
So if we want to unite the earth, we need an extra terrestrial threat. It could be asteroid or alien invasion. Now these are less probable, hence we should set up Martian colonies and then just allow the earthlings to do their thing. They will eventually treat Mars humans as a threat. This is our only option to unify the earth.
It could also end up being an exclusive resort for the elite of our society to escape to, so they may no longer have to pretend to care about Earth at all.
Why do we think that a unified earth will be a good thing? It seems too utopian to me...
Why would anybody think that's not a good thing?
It sounds boring...
The atomic bomb is a notable example, and consider Eisenhower and many other military leaders said "there was no reason to use that awful thing." I realize my high school education, and most othet's, led me to believe this wasn't the case.
I'm not trying to say it's wrong, but it deserves a lot of skepticism.
It is difficult to question the possible outcomes if different choices were made but you can be sure that the last 80 years could have been much different and much worse. The bomb did make certain kinds of war impossible, and it is not clear if that would be true if they had not been used when they were.
The bomb were used on an enemy that was sooo defeated that there was a coup attempt by the military between the two bombs to prevent the emperor from capitulating.
In this case you're only speaking for yourself.
Most Asians, from the Middle East through to the South East, would kindly disagree.
If you spend some time looking at the divisive, genocidal campaigns of the Americans, British and French across Western, Southern and South-Eastern Asia it's not hard to see why.
As you can imagine, he had a far more positive view of Western occupation than Russian occupation.
He was not a member of the Nazi party, but was in the military. The story, as best as I can recall: After they ran out of gas, the soldiers were given bicycles and panzerfaust, and told to head East, because the Russians were invading.
He hid in a hole as Russian tanks drove past. He deserted, and went West as fast as he could, deliberately getting himself captured by the invading US forces.
He said he was treated better by the Americans as a prisoner of war than he was by the Nazis as a soldier. I don't think any soldiers captured by the Russians would say the same.
Not long thereafter, the war in Germany ended. While the soviets plundered East Germany, the Americans with the Marshall plan helped rebuild West Germany. My grandfather, having not been a member of the Nazi party, was also treated very well during this period.
Even though allied bombs destroyed 80% of his home city, this earned the US enough goodwill in his eyes (and probably many of his generation) that throughout the rest of his life, he supported the US (even while he didn't agree with everything they did). His daughter ended up marrying an American.
If enemy soldiers thought you'd treat them better after they surrender than they're being treated now, they're not likely to fight very hard. Unfortunately, I think we have an instinctual urge to punish enemies. We like negative sum games.
On the other hand, let's consider how popular inter-Asian occupation was.
Personally, I don't understand this, but I'm from an ex-Eastern Bloc country which I was all too happy to escape.
I'd rather the US (and the rest of the Western world) made bombs than only Russia and China did. Vacuums of power in the world will always be filled and a Western invasion/expeditionary force is a much nicer alternative to a Russian one.